/* center modal */
function centerModals() {   
    $('#myModal').each(function(i) {   
        var $clone = $(this).clone().css('display', 'block').appendTo('body'); var top = Math.round(($clone.height() - $clone.find('.modal-content').height()) / 2);   
        top = top > 0 ? top : 0;   
        $clone.remove();   
        $(this).find('.modal-content').css("margin-top", top);   
    });   
}   
$('#myModal').on('show.bs.modal', centerModals);   
$(window).on('resize', centerModals);